diff --git a/nms-patches/net/minecraft/util/datafix/DataConverterRegistry.patch b/nms-patches/net/minecraft/util/datafix/DataConverterRegistry.patch
index 1148881f2..f5fa33fc6 100644
--- a/nms-patches/net/minecraft/util/datafix/DataConverterRegistry.patch
+++ b/nms-patches/net/minecraft/util/datafix/DataConverterRegistry.patch
@@ -1,6 +1,6 @@
 --- a/net/minecraft/util/datafix/DataConverterRegistry.java
 +++ b/net/minecraft/util/datafix/DataConverterRegistry.java
-@@ -510,6 +510,18 @@
+@@ -511,6 +511,18 @@
          datafixerbuilder.addFixer(new DataConverterItemFrame(schema44, false));
          Schema schema45 = datafixerbuilder.addSchema(1458, DataConverterRegistry.SAME_NAMESPACED);
  
@@ -19,7 +19,7 @@
          datafixerbuilder.addFixer(new DataConverterCustomNameEntity(schema45, false));
          datafixerbuilder.addFixer(new DataConverterCustomNameItem(schema45, false));
          datafixerbuilder.addFixer(new DataConverterCustomNameTile(schema45, false));
-@@ -768,7 +780,8 @@
+@@ -769,7 +781,8 @@
          datafixerbuilder.addFixer(new DataConverterAddChoices(schema110, "Added Zoglin", DataConverterTypes.ENTITY));
          Schema schema111 = datafixerbuilder.addSchema(2523, DataConverterRegistry.SAME_NAMESPACED);
  
@@ -29,7 +29,7 @@
          Schema schema112 = datafixerbuilder.addSchema(2527, DataConverterRegistry.SAME_NAMESPACED);
  
          datafixerbuilder.addFixer(new DataConverterBitStorageAlign(schema112));
-@@ -831,12 +844,14 @@
+@@ -832,12 +845,14 @@
          datafixerbuilder.addFixer(new DataConverterAddChoices(schema130, "Added Glow Squid", DataConverterTypes.ENTITY));
          datafixerbuilder.addFixer(new DataConverterAddChoices(schema130, "Added Glow Item Frame", DataConverterTypes.ENTITY));
          Schema schema131 = datafixerbuilder.addSchema(2690, DataConverterRegistry.SAME_NAMESPACED);
@@ -46,7 +46,7 @@
  
          datafixerbuilder.addFixer(DataConverterItemName.create(schema132, "Rename copper item suffixes", createRenamer(immutablemap1)));
          datafixerbuilder.addFixer(DataConverterBlockRename.create(schema132, "Rename copper blocks suffixes", createRenamer(immutablemap1)));
-@@ -844,7 +859,8 @@
+@@ -845,7 +860,8 @@
  
          datafixerbuilder.addFixer(new AddFlagIfNotPresentFix(schema133, DataConverterTypes.WORLD_GEN_SETTINGS, "has_increased_height_already", false));
          Schema schema134 = datafixerbuilder.addSchema(2696, DataConverterRegistry.SAME_NAMESPACED);
@@ -56,7 +56,7 @@
  
          datafixerbuilder.addFixer(DataConverterItemName.create(schema134, "Renamed grimstone block items to deepslate", createRenamer(immutablemap2)));
          datafixerbuilder.addFixer(DataConverterBlockRename.create(schema134, "Renamed grimstone blocks to deepslate", createRenamer(immutablemap2)));
-@@ -931,10 +947,11 @@
+@@ -932,10 +948,11 @@
          datafixerbuilder.addFixer(new DataConverterAddChoices(schema159, "Added Allay", DataConverterTypes.ENTITY));
          Schema schema160 = datafixerbuilder.addSchema(3084, DataConverterRegistry.SAME_NAMESPACED);
  
@@ -70,7 +70,7 @@
              int2objectopenhashmap1.defaultReturnValue("minecraft:tabby");
              int2objectopenhashmap1.put(0, "minecraft:tabby");
              int2objectopenhashmap1.put(1, "minecraft:black");
-@@ -951,7 +968,8 @@
+@@ -952,7 +969,8 @@
  
          Objects.requireNonNull(int2objectopenhashmap);
          datafixerbuilder.addFixer(new EntityVariantFix(schema161, "Change cat variant type", typereference, "minecraft:cat", "CatType", int2objectopenhashmap::get));
diff --git a/pom.xml b/pom.xml
index a228e5f61..e64f60566 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <groupId>org.bukkit</groupId>
     <artifactId>craftbukkit</artifactId>
     <packaging>jar</packaging>
-    <version>1.21.2-R0.1-SNAPSHOT</version>
+    <version>1.21.3-R0.1-SNAPSHOT</version>
     <name>CraftBukkit</name>
     <url>https://www.spigotmc.org/</url>
 
diff --git a/src/main/java/org/bukkit/craftbukkit/util/ApiVersion.java b/src/main/java/org/bukkit/craftbukkit/util/ApiVersion.java
index 7f2c0bfd9..b90ee9916 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/ApiVersion.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/ApiVersion.java
@@ -16,7 +16,7 @@ public final class ApiVersion implements Comparable<ApiVersion>, Serializable {
 
     static {
         versions = new HashMap<>();
-        CURRENT = getOrCreateVersion("1.21.2");
+        CURRENT = getOrCreateVersion("1.21.3");
         FLATTENING = getOrCreateVersion("1.13");
         FIELD_NAME_PARITY = getOrCreateVersion("1.20.5");
         NONE = getOrCreateVersion("none");
diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
index 20cd67e13..aefbeeec0 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
@@ -232,7 +232,7 @@ public final class CraftMagicNumbers implements UnsafeValues {
      * @return string
      */
     public String getMappingsVersion() {
-        return "ec8b033a89c54252f1dfcb809eab710a";
+        return "61a218cda78417b6039da56e08194083";
     }
 
     @Override